CN1988647A - Receiver and tuner - Google Patents
Receiver and tuner Download PDFInfo
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- CN1988647A CN1988647A CNA200610107774XA CN200610107774A CN1988647A CN 1988647 A CN1988647 A CN 1988647A CN A200610107774X A CNA200610107774X A CN A200610107774XA CN 200610107774 A CN200610107774 A CN 200610107774A CN 1988647 A CN1988647 A CN 1988647A
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- unit
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- input
- tuning
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N7/00—Television systems
- H04N7/16—Analogue secrecy systems; Analogue subscription systems
- H04N7/173—Analogue secrecy systems; Analogue subscription systems with two-way working, e.g. subscriber sending a programme selection signal
- H04N7/17309—Transmission or handling of upstream communications
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04H—BROADCAST COMMUNICATION
- H04H60/00—Arrangements for broadcast applications with a direct linking to broadcast information or broadcast space-time; Broadcast-related systems
- H04H60/76—Arrangements characterised by transmission systems other than for broadcast, e.g. the Internet
- H04H60/81—Arrangements characterised by transmission systems other than for broadcast, e.g. the Internet characterised by the transmission system itself
- H04H60/93—Wired transmission systems
- H04H60/96—CATV systems
- H04H60/97—CATV systems using uplink of the CATV systems
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
- H04N21/40—Client devices specifically adapted for the reception of or interaction with content, e.g. set-top-box [STB]; Operations thereof
- H04N21/41—Structure of client; Structure of client peripherals
- H04N21/426—Internal components of the client ; Characteristics thereof
- H04N21/42607—Internal components of the client ; Characteristics thereof for processing the incoming bitstream
- H04N21/4263—Internal components of the client ; Characteristics thereof for processing the incoming bitstream involving specific tuning arrangements, e.g. two tuners
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
- H04N21/40—Client devices specifically adapted for the reception of or interaction with content, e.g. set-top-box [STB]; Operations thereof
- H04N21/45—Management operations performed by the client for facilitating the reception of or the interaction with the content or administrating data related to the end-user or to the client device itself, e.g. learning user preferences for recommending movies, resolving scheduling conflicts
- H04N21/462—Content or additional data management, e.g. creating a master electronic program guide from data received from the Internet and a Head-end, controlling the complexity of a video stream by scaling the resolution or bit-rate based on the client capabilities
- H04N21/4622—Retrieving content or additional data from different sources, e.g. from a broadcast channel and the Internet
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
- H04N21/40—Client devices specifically adapted for the reception of or interaction with content, e.g. set-top-box [STB]; Operations thereof
- H04N21/47—End-user applications
- H04N21/472—End-user interface for requesting content, additional data or services; End-user interface for interacting with content, e.g. for content reservation or setting reminders, for requesting event notification, for manipulating displayed content
- H04N21/47202—End-user interface for requesting content, additional data or services; End-user interface for interacting with content, e.g. for content reservation or setting reminders, for requesting event notification, for manipulating displayed content for requesting content on demand, e.g. video on demand
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N5/00—Details of television systems
- H04N5/44—Receiver circuitry for the reception of television signals according to analogue transmission standards
- H04N5/46—Receiver circuitry for the reception of television signals according to analogue transmission standards for receiving on more than one standard at will
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N7/00—Television systems
- H04N7/10—Adaptations for transmission by electrical cable
- H04N7/106—Adaptations for transmission by electrical cable for domestic distribution
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- Engineering & Computer Science (AREA)
- Signal Processing (AREA)
- Multimedia (AREA)
- Databases & Information Systems (AREA)
- Human Computer Interaction (AREA)
- Two-Way Televisions, Distribution Of Moving Picture Or The Like (AREA)
- Circuits Of Receivers In General (AREA)
Abstract
The invention provides a receiver which can receive both of a terrestrial wave broadcast and a CATV broadcast capable of bidirectional service, and output uplink data to the CATV broadcast. In order solve above problems, the receiver comprises a terrestrial wave input unit for inputting a terrestrial wave signal; a CATV input/output unit for inputting a CATV signal from a CATV network or outputting a signals to the CATV network; a branch circuit for branching or spliting the CATV signal inputted from the CATV network; a selector for selecting one of the terrestrial wave broadcast signal and the CATV signal; a main tuner for tuning to a predetermined channel; and a controller that controls the selector and the main tuner; wherein the controller performs control, regardless of the signal selected by the selector, to branches or splits the CATV signal input from the CATV network through the CATV input/output unit, or to outputs the signal to the CATV network through the CATV input/output unit.
Description
Technical field
The present invention relates to receive ground wave broadcast or cable TV (Cable Television) (hereinafter referred to as CATV) broadcasting, the receiving system of output image signal and voice signal and tuner.
Background technology
The ground wave digital broadcasting of the U.S., utilize 8VSB (residual side wave band modulation: Vestigial SideBand) to make picture signal, voice signal, data-signal carry out the TS (transportation flow: Transport Stream), send of code multi-way multiplex by MPEG2 (the phase 2:Moving Picture Experts GroupPhase of animation expert group 2) with the transmission band of 54MHz～806MHz.
On the other hand, the digital CATV broadcasting of the U.S., utilize 64QAM or 256QAM (quadrature amplitude modulation: Quadrature Amplitude Modulation) TS that is made picture signal, voice signal, data-signal code multi-way multiplex by MPEG2 is modulated, and send with the transmission band of 54MHz～806MHz.In addition, in digital CATV broadcasting, in looking purposes such as hearer's management, audiovisual restriction, video request, utilize the data channel of up link or down link to carry out the data transmission reception of receiving system and CATV office.
Shared receiving system as ground wave broadcast and CATV broadcasting, in the television broadcasting receiving device of Japanese patent laid-open 11-355681 communique, disclose: utilize commutation circuit by realizations such as high frequency relays, to selectively switching from the reception high-frequency signal of the exterior antenna that is connected in antenna input with from the input high-frequency signal of the CATV cable that is connected in the CATV input terminal; Simultaneously, utilize commutation circuit, carry out the switching of demodulator circuit, make that 1 table apparatus can be corresponding with whole broadcast modes of ground wave broadcast and CATV broadcasting by realizations such as high frequency relays.
Summary of the invention
Yet in the television broadcasting receiving device of above-mentioned patent documentation, the situation by accepting from the receiving downlink data passage of CATV net when receiving ground wave broadcast or CATV broadcasting is not all paid attention to.
In addition, because the switching of commutation circuit changes the input impedance of receiving system, produce the problem that the CATV net is impacted.
In addition,, handle the problem of the signal (uplink data signals) that sends to the CATV net, do not consider in the technology formerly in can receiving the two device of ground wave broadcast signal and CATV signal.
The present invention considers the problems referred to above and proposes, and its objective is to provide to receive the receiving system that sends ground wave broadcast and CATV broadcasting.
In order to achieve the above object, according to claim 1, have: the earthwave input unit of input ground wave broadcast signal; Be used for signal from CATV net input CATV, or to the CATV input-output unit of CATV net output signal; By this CATV input-output unit, make from the CATV signal branch of CATV net input or the finger assignments unit of distribution;
From this ground wave broadcast signal and this CATV signal, select the selected cell of a signal by this finger assignments cell branch or distribution by this earthwave input unit input; From by selected this signal of this selected cell, the main tuning unit of the channel of tuning expectation; Control unit with this selected cell of control and this main tuning unit; Wherein, this control unit is controlled, and in order to be independent of by the selected signal of this selected cell, the CATV signal of importing from the CATV net by this CATV input-output unit is carried out branch or distribution; Or by this CATV input-output unit, to CATV net output signal.
According to the present invention, can provide a kind of needn't make look the hearer for to ground wave broadcast and CATV broadcasting switch and carry out the receiving system of troublesome operation.
Description of drawings
Fig. 1 adopts the structure example block diagram of the receiving system of first execution mode of the present invention for expression;
Fig. 2 utilizes the block diagram of the processing of two input selection portions for describing in detail in the receiving system that adopts first execution mode of the present invention;
Fig. 3 utilizes the block diagram of the processing of TS switching part for describing in detail in the receiving system that adopts first embodiment of the invention;
Fig. 4 is the block diagram of the structure example of the receiving system of expression employing second embodiment of the invention;
Fig. 5 utilizes the block diagram of the processing of two input selection portions for describing in detail in the receiving system that adopts second embodiment of the invention;
Fig. 6 adopts the structure example block diagram of the receiving system of third embodiment of the invention for expression;
Fig. 7 utilizes the block diagram of the processing of TS switching part for describing in detail in the receiving system that adopts third embodiment of the invention;
Embodiment
Below, execution mode is elaborated, same-sign, identical mark represents that structure is identical.
Below, first execution mode is described.Fig. 1 is the block diagram of the structure example of the receiving system of expression present embodiment.
In Fig. 1, reception antenna 100 receives the broadcasting wave of utilizing ground wave broadcast, and received signal is supplied to channel selection portion 101.In addition, channel selection portion 101 has the terminal of importing by the broadcast singal of CATV network transmission, and supplies with the CATV broadcast singal.
Tuning 110 fdc signal with supply of FDC, frequency translation is carried out the level adjustment simultaneously, and is supplied to QPSK demodulation section 111 to desirable IF frequency band (for example 44MHz).The fdc signal that 111 demodulation of QPSK demodulation section are supplied with.By the demodulating data of QPSK demodulation section demodulation,, be supplied to security component 113 by security component interface portion 112.In addition, utilize 111 couples of FDC of QPSK demodulation section to carry out level control for tuning 110.
On the other hand, channel selection portion 101 has, to the data channel (reverse data channel outside the frequency band: the input terminal of (hereinafter referred to as " RDC ") usefulness Out-Of-Band Reversed Data Channel) of the CATV up link that sends from receiving system with 5MHz～42MHz transmission band.The RDC signal can utilize by QPSK modulation portion 115, the data of supplying with from control part 116 is carried out the QPSK modulation obtain, and it is adjusted to the CATV network planning and decides level by variable enlarging section 114, by channel selection portion 101, sends the net to CATV.
In addition, channel selection portion 101 can be in ground wave broadcast signal of supplying with and CATV broadcast singal, selected desired channel from any one broadcast singal.Utilize 8VSB to modulate, and transmit the ground wave broadcast signal of the U.S. with the transmission band of 54MHz～806MHz.On the other hand, utilize 64QAM or 256QAM modulation, and transmit the CATV broadcast singal of the U.S. with the transmission band of 54MHz～864MHz.Particularly exist, in the CATV broadcasting, claim the transmission band that is transmitted to be band interior (In-Band), and transmit through MPEG2 encoded image signal, voice signal, data-signal.Claim that with respect to FDC and RDC the passage that transmits is that (forward direction applies transfer passage to the FAT passage: Forward Application Transport Channel) in band.
To be supplied to SAW filter 102 by channel selection portion 101 selected broadcast singals.SAW filter 102 is the filter of frequency bandwidth 6MHz, and the broadcast singal of supplying with is carried out frequency band limits, is supplied to IF AGC enlarging section 103.Level is adjusted in IFAGC enlarging section 103, makes the signal level of the broadcast singal of supply be optimal level for demodulation section 104, and is supplied to demodulation section 104.Demodulation section 104 has 8VSB/QAM demodulation section 105 and error correction portion 106, and the broadcast singal of supplying with is carried out separating the mediation correction process accordingly with broadcast mode, and TS (transportation flow) signal is supplied to TS switching part 107.Undertaken the level of IF AGC enlarging section 103 is controlled by demodulation section 104.
107 switchings of TS switching part directly are supplied to signal processing part 108 with the TS signal that is supplied to, and perhaps resupply behind security component interface 112 and security component 113.Utilize security component 113 to remove the audiovisual restriction of the TS signal of supplying with, and, be supplied to TS switching part 107 by security component interface 112.The TS signal of 108 pairs of supplies of signal processing part carries out multiplexing separating treatment and decoding is handled, output image signal and voice signal.
Below, the processing of channel selection portion 101 shown in Figure 1 is elaborated.Fig. 2 is the block diagram that is used to describe in detail the channel selection portion 101 shown in Fig. 1.Channel selection portion 101 has the earthwave input part 200 of the ground wave broadcast signal that input receives by reception antenna 100 and the input CATV input and output portion 203 by the broadcast singal of CATV network transmission.These input and output portions can be set at terminals such as F type connector, but are not to only limit to this.
Ground wave broadcast signal in the input earthwave input part 200 through being the high pass filter 201 more than the 54MHz by frequency band, is supplied to enlarging section 202.The ground wave broadcast signal of the 202 pairs of supplies in enlarging section amplifies, and is supplied to switch 209.
On the other hand, with being supplied to the CATV broadcast singal of CATV input and output portion,, be supplied to high pass filter 206 by directivity joint portion 204.High pass filter 206 passes through the above signal of 54MHz of the CATV broadcast singal of supply, is supplied to enlarging section 207.The CATV broadcast singal of the 207 pairs of supplies in enlarging section amplifies, and is supplied to branching portion 208.
Branching portion 208 branches into FAT channel signal and fdc signal with the CATV broadcast singal of supplying with, and the FAT channel signal is supplied to switch 209, and fdc signal is supplied to band pass filter shown in Figure 1 109.Ground wave broadcast signal that switch 209 selections are supplied to and any one in the CATV broadcast singal are supplied to tuning 210.In the broadcast singal of supplying with, a channel frequence is converted into desirable IF frequency band (for example 44MHz) for tuning 210, simultaneously, carries out the level adjustment, be supplied to SAW filter 102 shown in Figure 1.
To supply with the RDC signal from variable enlarging section 114,, be supplied to directivity joint portion 204 through being the low pass filter below the 54MHz by frequency band.In joint portion 204, export the RDC signal input and output portion 203 sides of CATV to, and be sent to the CATV net, utilize high pass filter 206 obstruction signals.
Below, the processing of TS switching part 107 shown in Figure 1 is elaborated.Fig. 3 is the block diagram that is used to describe in detail the TS switching part 107 shown in Fig. 1.In Fig. 3,301 and 302 is diverter switch, can select the path of TS.303,304 and 305 expression TS paths.
In addition, in inputing to the TS signal of TS switching part 107, comprise data-signal, clock signal, synchronizing signal, startup (enable) signal, error (error) signal etc. Diverter switch 301 and 302 switching be by control part 116 controls, can switch not via the path of security component 113 with via the path of this assembly.
In addition, though in Fig. 1～Fig. 3, do not illustrate, channel selection portion 101, demodulation section 104, TS switching part 107, signal processing part 108, QPSK demodulation section 111, the processing of QPSK modulation portion 115 is by control part 116 unified controls.
Below, the action of the channel selection in the receiving system of present embodiment is elaborated.
In the channel selection of the channel selection of being operated by the user and reservation audiovisual or subscription and video recording, under the situation of selecting ground wave broadcast, control part 116 control switchs 209 are supplied to tuning 210 with the ground wave broadcast signal; In addition, control demodulation section 104 makes can to utilize to separate accordingly with the ground wave broadcast mode to be in harmonious proportion error correcting system and to separate the mediation correction process.Meanwhile, control its switch 301 and 302 makes in TS switching part 107, and the TS path becomes the path (TS path 303) of not passing through security component 113.
In addition, in channel selection by user's operation, in the channel selection of reservation audiovisual or subscription and video recording, under the situation of selecting CATV broadcasting, control part 116 control switchs 209 are supplied to tuning 210 with the CATV broadcast singal, in addition, control demodulation section 104 makes utilization and CATV broadcast mode separate the mediation error correcting system accordingly and separates the mediation correction process.In addition, under the situation that security component 113 is inserted in the security component interface 112, handle for being decrypted (descramble), control its switch 301 and 302 then makes the TS path become path (304 → TS path, TS path 305) by security component 113 in TS switching part 107.On the other hand, do not insert at security component 113 under the situation of security component interface 112, control its switch 301 and 302 makes the TS path become the path (TS path 303) of not passing through security component 113 in TS switching part 107.
According to above action, but can receive the CATV broadcasting of carrying out ground wave broadcast and twocouese service, can provide a kind of channel selection to switch and exempt the receiving system of looking hearer's troublesome operation because of ground wave broadcast and CATV broadcasting by a receiving system.In addition, by in ground wave broadcast signal and CATV broadcast singal, individually having amplifier, can provide a kind of receiving system that input impedance is not changed because of the handover operation of ground wave broadcast and CATV broadcasting.
In addition,, have the branching portion that fdc signal is used, can when receiving the ground wave broadcast signal, not make NF (noise figure: NoiseFigure) deterioration, the receiving sensitivity of maintenance ground wave broadcast by at ground wave broadcast and CATV broadcasting selector switch leading portion.
In addition, when utilizing structure shown in Figure 2 to sell as goods (for example tuner), for the technical staff of design receiving system, increase versatility, it is resultful reducing receiving system system's manufacturing cost or increasing design freedom.
Execution mode 2
Below, second execution mode is described.Fig. 4 is the block diagram of the structure example of expression receiving system of the present invention.
The structure of the receiving system of present embodiment is in the structure of the receiving system shown in the execution mode 1, to append a system of the acceptance division of selection and demodulation ground wave broadcast signal and CATV broadcast singal (FAT passage).In Fig. 4, desirable channel is selected from any one broadcast singal by channel selection portion 117 in the ground wave broadcast signal and CATV broadcast singal of input, be supplied to the refined device 102 of SAW.In addition, desired channel is selected from any one broadcast singal by channel selection portion 117 in the ground wave broadcast signal and CATV broadcast singal of input, be supplied to SAW filter 118.Be supplied to the signal of SAW filtering 102 and SAW filter 118,, can distinguish independently and select for the difference and the no restriction of channel selection channel of ground wave broadcast and CATV broadcasting.
The broadcast singal that is supplied to SAW filter 102 carries out the processing same with execution mode 1 in IF AGC enlarging section 103 and demodulation section 104, the TS signal is supplied to TS switching part 107.On the other hand, be supplied to the broadcast singal of SAW filter 118, in IF AGC enlarging section 119 and demodulation section 120, carry out the processing same, and the TS signal is supplied to signal processing part 123 with execution mode 1.
In addition, identical with channel selection portion 101 shown in Figure 1, channel selection portion 117 has the lead-out terminal of fdc signal and the input terminal of RDC signal, in band pass filter 109, tuning 110 of FDC, QPSK demodulation section 111, variable enlarging section 114, QPSK modulation portion 115, carry out the action same with execution mode 1.
Below, the processing of channel selection portion 117 shown in Figure 4 is carried out.Fig. 5 is for describing the block diagram of channel selection portion 117 usefulness shown in Fig. 4 in detail.The structure of the channel selection portion 117 of present embodiment is that the switch 209 of the structure of the channel selection portion 101 shown in the execution mode 1 becomes and can individually select the matrix type switch 212 exported, and appends in Fig. 4 broadcast singal is supplied to tuning 211 structure in the SAW filter 118 that appends.
Matrix type switch 212 is selected in the ground wave broadcast signal that is supplied to and the CATV broadcast singal any one, and is supplied to tuning 210, simultaneously, selects to be supplied in ground wave broadcast signal and the CATV broadcast singal any one, is supplied to tuning 211.Be supplied to tuning 210 and tuning 's 211 signal, to the difference of ground wave broadcast and CATV broadcasting without limits, can distinguish independently and select.Tuning 210 and tuning 211, in the broadcast singal of supplying with, a passage is carried out frequency translation to desired IF frequency band (for example 44MHz), simultaneously, carry out the level adjustment, and be supplied to SAW filter 102 shown in Figure 4 and SAW filter 118.
In addition, though in Fig. 4 and Fig. 5, do not illustrate, utilize control part 116 control demodulation sections 104 and 210, TS switching part 107, signal processing part 123, QPSK demodulation section 111, QPSK modulation portion 115, the processing of channel selection portion 117.
Below, the channel selection action of the receiving system that utilizes present embodiment is elaborated.
In the channel selection of the channel selection of operating by the user and reservation audiovisual or subscription and video recording, in tuning 210 and tuning 211, select under the situation of ground wave broadcast simultaneously, control part 116 gating matrix type switches 212, the ground wave broadcast signal is supplied to tuning 210 and tuning 211, control demodulation section 104 and demodulation section 120 again, make to utilize to separate accordingly to be in harmonious proportion error correcting system and to separate the mediation correction process with the ground wave broadcast mode.Meanwhile, control its switch 301 and 302 makes in TS switching part 107, and the TS path becomes the path (TS path 303) of not passing through security component 113.
In addition, in channel selection by user's operation, in the channel selection of reservation audiovisual or subscription and video recording, in tuning 210 and tuning 211, select simultaneously under the situation of CATV broadcasting, control part 116 gating matrix type switches 212, the CATV broadcast singal is supplied to tuning 210 and tuning 211, controls demodulation section 104 and demodulation section 120 again, make utilization and CATV broadcast mode separate the mediation error correcting system accordingly and separate the mediation correction process.In addition, security component 113 being inserted under the situation of security component interfaces 112, for being decrypted processing, control its switch 301 and 302 then makes the TS path become path (304 → TS path, TS path 305) by security component 113 in TS switching part 107.On the other hand, do not insert at security component 113 under the situation of security component interface 112, control its switch 301 and 302 makes the TS path become the path (TS path 303) of not passing through security component 113 in TS switching part 107.
In addition, in channel selection by user's operation, in the channel selection of reservation audiovisual or subscription and video recording, selecting respectively under each situation of one of ground wave broadcast and CATV broadcasting, control part 116 gating matrix type switches 212, the CATV broadcast singal is supplied to tuning 210, the ground wave broadcast signal is supplied to tuning 211; Control demodulation section 104 again, make to utilize to separate accordingly to be in harmonious proportion error correcting system and to separate the mediation correction process with the CATV broadcast mode; Control demodulation section 120 again, make and to utilize the corresponding mediation error correcting system of separating to separate the mediation correction process with the ground wave broadcast mode.
In addition, security component 113 is being inserted under the situation of security component interface 112, in order to be decrypted processing, and control its switch 301 and 302, in TS switching part 107, make the TS path become path (304 → TS path, TS path 305), on the other hand, do not insert at security component 113 under the situation of security component interface 112 by security component 113, control its switch 301 and 302 makes the TS path become the path (TS path 303) of not passing through security component 113 in TS switching part 107.
When security component 113 was inserted security component interface 112, the RDC signal often becomes can be to the state of CATV net transmission.In addition, utilizing the input impedance of CATV input and output portion 203, with the selection path independence that utilizes switch 209, and is certain, reduces the influence that the CATV net is caused because of reflection etc.
According to above action, but can receive the CATV broadcasting of carrying out ground wave broadcast and twocouese service by a receiving system, can provide a kind of selection to switch and exempt the receiving system of looking hearer's troublesome operation because of ground wave broadcast and CATV broadcasting, in addition, by in whole combinations of ground wave broadcast and CATV broadcasting, can obtain the video/audio output that two pictures show or the backstage program recording is used.
But, among Fig. 4, under the situation that the CATV broadcast singal that 120 pairs of audiovisual of SAW filter 118, IF AGC enlarging section 119, demodulation section that utilization is appended limit receives, owing to can not utilize the decryption processing of security component 113, therefore, it is useful this receiving system being fixed for ground wave broadcast.
In addition, by in ground wave broadcast signal and CATV broadcast singal, individually having amplifier, can provide a kind of receiving system that input impedance is not changed because of the handover operation of ground wave broadcast and CATV broadcasting.In addition, the selector switch leading portion by in ground wave broadcast and CATV broadcasting has the branching portion that fdc signal is used, and can not make NF (noise figure) deterioration when receiving the ground wave broadcast letter, keeps the ground wave broadcast receiving sensitivity.
In the present embodiment, describe the action of two demodulation section structures of tool in detail, also can extend to structure certainly with three above demodulation sections.
Execution mode 3
Below, the 3rd execution mode is carried out.Fig. 6 is the structure example block diagram of the receiving system of expression present embodiment.
The structure of the receiving system of present embodiment is the TS switching part 107 in the receiving system structure shown in the execution mode 2 to be replaced into the structure of the synthetic switching part 124 of TS.From the TS signal of demodulation section 120 outputs, be supplied to signal processing part 123 by the synthetic switching part 124 of TS.In addition, security component interface 112 and security component 113 form corresponding security component interface 125 and the corresponding security component 126 of a plurality of TS of a plurality of TS that is respectively corresponding with a plurality of TS.
Below, the processing of TS shown in Figure 6 being synthesized switching part 124 is elaborated.Fig. 7 is for describing the block diagram of the synthetic switching part 124 of the TS shown in Fig. 6 in detail.In Fig. 7,701,702,703 and 704 is diverter switch, can select the TS path.707,708,709,710,711 and 712 expression TS paths.In addition, comprise data-signal, clock signal, synchronizing signal, enabling signal, error signal etc. in the TS signal in the synthetic switching part 124 of input TS.
Diverter switch 701,702,703 and 704 switching is controlled by control part 116.A plurality of TS signals of multiplexed 705 pairs of inputs carry out multiplexed processing, and becoming with the corresponding security component 126 of many TS is the signal of benchmark, and are supplied to the corresponding security component 126 of a plurality of TS by the corresponding security component interface 125 of a plurality of TS.Utilize the corresponding security component 126 of a plurality of TS, the signal that is supplied to is decrypted processing, and is supplied to multiplexing separated part 706.
Multiplexing separated part 706 is separated into a plurality of TS with the multiplexed TS signal multiplexing of supplying with.In the TS of multiplexing separation, the TS signal that will reduce through the TS signal of switch 703 inputs is supplied to switch 704, and the TS signal that will reduce through the TS signal of switch 701 inputs is supplied to switch 702.
Below, the channel selection action of the receiving system of present embodiment is elaborated.In the channel selection of the channel selection of operating by the user and reservation audiovisual or subscription and video recording, in tuning 210 and tuning 211, select under the situation of ground wave broadcast simultaneously, control part 116 gating matrix type switches 212, the ground wave broadcast signal is supplied to tuning 210 and tuning 211, control demodulation section 104 and demodulation section 120 again, make to utilize to separate accordingly to be in harmonious proportion error correcting system and to separate the mediation correction process with the ground wave broadcast mode.
Meanwhile, in the synthetic switching part 124 of TS, control its switch 701,702,703,704 makes from the corresponding security component 126 (TS path 707 and TS path 708) of all obstructed too much TS of TS signal of demodulation section 104 and demodulation section 120 supplies.
In channel selection by user's operation, in the channel selection of reservation audiovisual or subscription and video recording, in tuning 210 and tuning 211, select simultaneously under the situation of CATV broadcasting, control part 116 gating matrix type switches 212, the CATV broadcast singal is supplied to tuning 210 and tuning 211, control demodulation section 104 and demodulation section 120 again, make utilization and CATV broadcast mode separate the mediation error correcting system accordingly and separate the mediation correction process.
In addition, the corresponding security component 126 of many TS is being inserted under the situation of the corresponding security component interface 125 of many TS, in order to be decrypted processing, control its switch 701,702,703 and 704, in the synthetic switching part 125 of TS, make the TS path become path (711 → TS path, TS path 712 and 709 → TS path, TS path 710) by the corresponding security components 126 of many TS.
On the other hand, do not insert under the situation of the corresponding security component interface 125 of many TS at the corresponding security component 126 of many TS, control its switch 701,702,703 and 704, in the synthetic switching part 124 of TS, make the path (TS path 707 and TS path 708) that all becomes the corresponding security component 126 of obstructed too much TS from the TS signal of demodulation section 104 and demodulation section 120 supplies.
In addition, in channel selection by user's operation, in the channel selection of reservation audiovisual or subscription and video recording, selecting respectively under each situation of one of ground wave broadcast and CATV broadcasting, control part 116 gating matrix type switches 212, the CATV broadcast singal is supplied to tuning 210, the ground wave broadcast signal is supplied to tuning 211; Portion 104 is detuned in control again, makes can utilize to separate accordingly with the CATV broadcast mode to be in harmonious proportion error correcting system and to separate the mediation correction process; Control demodulation section 120 again, make and to utilize the corresponding mediation error correcting system of separating to separate the mediation correction process with the ground wave broadcast mode.
In addition, the corresponding security component 126 of many TS is being inserted under the situation of the corresponding security component interface 125 of many TS, in order to be decrypted processing, and control its switch 701 and 704, in the synthetic switching part 125 of TS, make the TS signal of supplying with from demodulation section 104 become path (TS path 711 → 712) by the corresponding security components 126 of many TS, control its switch 702 and 703 makes the path (TS path 708) that becomes the corresponding security component 126 of obstructed too much TS from the TS signal of demodulation section 120 supplies again.
On the other hand, do not insert under the situation of the corresponding security component interface 125 of many TS at the corresponding security component 126 of many TS, control its switch 701,702,703 and 704, in the synthetic switching part 124 of TS, make the path (TS path 707 and TS path 708) that all becomes the corresponding security component 126 of obstructed too much TS from the TS signal of demodulation section 104 and demodulation section 120 supplies.
When security component 113 was inserted security component interface 112, the RDC signal often becomes can be to the state of CATV net transmission.In addition, utilizing the input impedance of CATV input and output portion 203, with the selection path independence that utilizes switch 209, and is certain, reduces the influence that the CATV net is caused because of reflection etc.
According to above action, but can receive the CATV broadcasting of carrying out ground wave broadcast and twocouese service by a receiving system, can provide a kind of selection to switch and exempt the receiving system of looking hearer's troublesome operation because of ground wave broadcast and CATV broadcasting, in addition, by in whole combinations of ground wave broadcast and CATV broadcasting, can obtain the video/audio output that two pictures show or the backstage program recording is used.And, under the situation of inserting the corresponding security component 126 of many TS, even when the CATV broadcast singal of receiving said audiovisual restriction, also can obtain two pictures show or the backstage program recording is used image and voice output.
In addition, by in ground wave broadcast signal and CATV broadcast singal, individually having amplifier, can provide a kind of receiving system that input impedance is not changed because of the handover operation of ground wave broadcast and CATV broadcasting.In addition, by the selector switch leading portion in ground wave broadcast and CATV broadcasting, the branching portion that the tool fdc signal is used can not make NF (noise figure) deterioration when receiving the ground wave broadcast letter, can keep the ground wave broadcast receiving sensitivity.
Channel selection portion shown in Figure 5 101 is placed in the metal framework, can improve the noise performance that elimination comes from the outside, in framework, comprise any one structural element illustrated in figures 1 and 2, also do not lose effect of the present invention.
In the present embodiment, describe the action of two demodulation section structures of tool in detail, also can extend to structure certainly with three above demodulation sections.
In the above-described embodiment, the ground wave broadcast of the U.S. and the modulation system and the transmission band of CATV broadcasting are had been described in detail, but in other modulation systems and load mode, also can obtain same effect.
In addition, be not limited to above-mentioned execution mode, in the scope that does not depart from its spirit, can do various distortion.And, in the above-described embodiment, comprise various inventions, by a plurality of constitutive requirements appropriate combination can be obtained multiple invention.For example, from the constitutive requirements shown in the execution mode, remove several constitutive requirements, can solve at least one problem described in the invention problems to be solved.When at least one effect described in the many effects that obtain inventing, the structure of removing these constitutive requirements also constitutes invention.
Claims (12)
1. receiving system is characterized in that having:
The earthwave input unit of input ground wave broadcast signal;
Be used for signal from CATV net input CATV, or to the CATV input-output unit of CATV net output signal;
By this CATV input-output unit, make from the CATV signal branch of CATV net input or the finger assignments unit of distribution;
From this ground wave broadcast signal and this CATV signal, select the selected cell of a signal by this finger assignments cell branch or distribution by this earthwave input unit input;
From by selected this signal of this selected cell, the main tuning unit of the channel of tuning expectation; With
Control the control unit of this selected cell and this main tuning unit;
This control unit is controlled, and in order to be independent of by the selected signal of this selected cell, the CATV signal of importing from the CATV net by this CATV input-output unit is carried out branch or distribution; Or by this CATV input-output unit, to CATV net output signal.
2. a receiving system can utilize a receiving system to receive ground wave broadcast and CATV broadcasting, it is characterized in that having:
Be used to import the earthwave input unit of ground wave broadcast signal;
Be used to import the CATV signal, or export the CATV input-output unit of the uplink data signals of CATV broadcasting to the CATV net;
Be used to make this CATV signal to pass through, and the directivity combining unit that this uplink data signals and this CATV anastomose are closed;
In the CATV signal that has passed through this directivity combining unit, make the finger assignments unit of downlink data signal branch or distribution;
From this ground wave broadcast signal and this CATV signal, select the selected cell of a broadcast singal by this finger assignments cell branch or distribution by this earthwave input unit input;
From by selected this signal of this selected cell, the main tuning unit of the channel of tuning expectation; With
Control the control unit of this selected cell and this main tuning unit;
This control unit can be controlled this selected cell according to the broadcast singal of expectation, simultaneously, is independent of by the selected broadcast singal of this selected cell, and this downlink data signal is carried out branch or distribution; And exportable this uplink data signals.
3. receiving system as claimed in claim 2 is characterized in that also having:
Amplification is by first amplifying unit of the ground wave broadcast signal of this earthwave input unit input; With
Amplification is by second amplifying unit of the CATV signal of this CATV input-output unit input.
4. receiving system as claimed in claim 2 is characterized in that having:
Broadcast singal by this main tuning units tune is carried out the principal solution of demodulation process and transfer the unit;
Insertion is used to remove the module interface unit of the module of audiovisual restriction;
To the switch unit of transferring the path of the signal of unit demodulation to switch by this principal solution;
The signal that is switched by this switch unit is deciphered the signal processing unit of processing;
To carrying out tuning secondary tuned cell by this downlink data signal of this finger assignments unit institute finger assignments; With
To by this pair tuned cell tuning signal carry out the secondary demodulating unit of demodulation process;
This control unit, control transfers the signal of unit demodulation whether to pass through this module interface unit by this principal solution.
5. as receiving system as described in the claim 4, it is characterized in that:
Be under the situation of earthwave signal by the selected broadcast singal of this selected cell,
This control unit, control transfers the signal of unit demodulation without this module interface unit by this principal solution;
Be under the situation of CATV signal by the selected broadcast singal of this selected cell,
This control unit, control are transferred the signal of unit demodulation through this module interface unit by this principal solution.
6. as claim 4 or 5 described receiving systems, it is characterized in that:
Modulating unit with modulates uplink data;
To be supplied to this directivity combining unit by the uplink data signals of this modulating unit modulation.
7. a receiving system can utilize a receiving system to receive ground wave broadcast and CATV broadcasting, it is characterized in that having:
Be used to import the earthwave input unit of ground wave broadcast signal;
Be used to import the CATV signal, send the CATV input-output unit of the uplink data signals of CATV broadcasting to the CATV net;
Be used to make this CATV signal to pass through, and the directivity combining unit that this uplink data signals and this CATV anastomose are closed;
In the CATV signal that has passed through this directivity combining unit, make the finger assignments unit of downlink data signal branch or distribution;
From this ground wave broadcast signal and this CATV signal,, select the selected cell of a broadcast singal for a tuned cell by this finger assignments cell branch or distribution by this earthwave input unit input;
From by selected this signal of this selected cell, at least one main tuning unit of the channel of tuning expectation; With
The control unit that this selected cell and at least one this main tuning unit are controlled;
This control unit according to the broadcast singal that needs tuning expectation at least one this main tuning unit, is controlled this selected cell; Simultaneously,
Can be independent of by the selected broadcast singal of this selected cell, this downlink data signal is carried out branch or distribution, and can send this uplink data signals.
8. receiving system as claimed in claim 7 is characterized in that having:
Amplification is by first amplifying unit of the broadcast singal of this earthwave input unit input; With
Amplification is by second amplifying unit of the broadcast singal of this CATV input-output unit input.
9. receiving system as claimed in claim 7 is characterized in that having:
According to broadcast mode, the broadcast singal by at least one this main tuning units tune is carried out at least one principal solution of demodulation process and transfer the unit;
Insertion is used for the module interface unit to the module of a plurality of signal relief audiovisual restrictions;
To the switch unit of transferring the path of the signal of unit demodulation to switch by at least one this principal solution;
To transferring the signal of unit demodulation to carry out multiplexed multiplexed unit by at least one this principal solution;
Make multiplex signal, the multiplexing multiplexing separative element that is separated into a plurality of signals by audiovisual that this module is removed restriction;
The signal that is switched by this switch unit is deciphered the signal processing unit of processing;
To carrying out tuning secondary tuned cell by this downlink data signal of this finger assignments unit institute finger assignments; With
To the secondary demodulating unit of mediating by the tuning signal of this pair tuned cell and handling;
This control unit, control transfers at least one signal of unit demodulation whether to pass through this module interface unit by at least one this principal solution.
10. receiving system as claimed in claim 9 is characterized in that:
Selecting broadcast singal by this selected cell is under the situation of earthwave signal,
This control unit, control transfers the signal of unit demodulation without this module interface unit by this principal solution;
At the broadcast singal of being selected by this selected cell is under the situation of CATV signal,
This control unit, control are transferred the signal of unit demodulation through this module interface unit by this principal solution.
11. receiving system as claimed in claim 9 is characterized in that:
Modulating unit with modulates uplink data;
To be supplied to this directivity combining unit by the uplink data signals of this modulating unit modulation.
12. a tuner is characterized in that having:
The earthwave input unit of input ground wave broadcast signal;
Be used for signal from CATV net input CATV, or to the CATV input-output unit of CATV net output signal;
Make by this CATV input-output unit from the CATV signal branch of CATV net input or the finger assignments unit of distribution;
In this ground wave broadcast signal and this CATV signal, select the selected cell of a signal by this finger assignments cell branch or distribution by this earthwave input unit input;
In selected this signal by this selected cell, the main tuning unit of the channel of tuning expectation; With
The control unit that this selected cell and this main tuning unit are controlled;
This control unit is controlled, and in order to be independent of by the selected signal of this selected cell, the CATV signal of importing from the CATV net by this CATV input-output unit is carried out branch or distribution; Or by this CATV input-output unit, to CATV net output signal.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2005365690A JP2007174002A (en) | 2005-12-20 | 2005-12-20 | Receiver and tuner |
| JP2005365690 | 2005-12-20 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN1988647A true CN1988647A (en) | 2007-06-27 |
Family
ID=38175320
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNA200610107774XA Pending CN1988647A (en) | 2005-12-20 | 2006-07-25 | Receiver and tuner |
Country Status (3)
| Country | Link |
|---|---|
| US (1) | US20070143822A1 (en) |
| JP (1) | JP2007174002A (en) |
| CN (1) | CN1988647A (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP2430779B1 (en) * | 2009-05-14 | 2018-10-17 | Tyco Electronics Subsea Communications Llc | Branching configuration including separate branching unit and predetermined wavelength filter unit and system and method including the same |
| GB201016081D0 (en) * | 2010-09-24 | 2010-11-10 | Peyton John | Switchable lounge plate |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2000253379A (en) * | 1999-02-25 | 2000-09-14 | Hitachi Ltd | Information transmission reception system, information receiver and information reception method |
| US6700624B2 (en) * | 1999-12-30 | 2004-03-02 | Lg Electronics Inc. | Combined terrestrial wave/cable broadcast receiver and program information processing method therefor |
| JP4427880B2 (en) * | 2000-08-24 | 2010-03-10 | ソニー株式会社 | TRANSMISSION DEVICE, TRANSMISSION METHOD, RECEPTION DEVICE, RECEPTION METHOD, AND RECORDING MEDIUM |
| JP4427909B2 (en) * | 2001-02-15 | 2010-03-10 | 三菱化学株式会社 | Home server device, video / audio data editing method and video / audio data generation method |
| US7701515B2 (en) * | 2004-02-13 | 2010-04-20 | Broadcom Corporation | Multi-input multi-output tuner front ends |
| JP4460344B2 (en) * | 2004-04-14 | 2010-05-12 | 日本放送協会 | Digital broadcast receiver and viewing guide program presentation program |
-
2005
- 2005-12-20 JP JP2005365690A patent/JP2007174002A/en active Pending
-
2006
- 2006-07-11 US US11/483,776 patent/US20070143822A1/en not_active Abandoned
- 2006-07-25 CN CNA200610107774XA patent/CN1988647A/en active Pending
Also Published As
| Publication number | Publication date |
|---|---|
| JP2007174002A (en) | 2007-07-05 |
| US20070143822A1 (en) | 2007-06-21 |
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